Dual ignition for outboard motors



A. J. CAILLE DUAL IGNITION FOR OUTBOARD MOTOR S Filed Dec. 30. 1925 g vuentoz Mb aw JM M I Patented Oct. 11, 1927. l

UNITED STATES PATENT OFFICE.

nnrnun J. cAI'LLE, or DETROIT, mrcmom.

' DUAL IGNITION FOR OUTBOARD MOTORS.

Application filed December The present invention relates to ignition systems for internal combustion engines and more specifically for what are known as outboard motors.

' Amon the objects of the invention, is to rovi e such engines with both magneto an battery ignition.

Another object is dual ignition for such motors in which thechange from the batter ignition to the magneto may be made wit less chance of stalling the motor than in installations heretofore used.

With these and other objects in view, as will more clearly hereinafter appear, the invention consists broadly in an engine pro: vided with magneto ignitionvin which the low tension circuit is, at a convenient place, so arranged that,.by the use of a simple mechanism, an exterior battery circuit may be substituted therefor. I 4

Reference should be made to the accompanying drawings, in'xwhichz- I Fig. l is a plan view of a well known outboard motor and the battery assembly;

Fig. 2 is an enlarged longitudinal section of the control handle and battery plug.

In the drawings, an outboard two cylinder motor is shown with the two opposed cylinders at 10 having spark plugs at 11 connected to the high tension side of the magneto by cables 12. The engine flywheel is shown at 15 and this carries on-its under side a conventional flywheel magneto A (not shown), controlled for timing by the handle 16 secured below the flywheel.

Handle 16 is shown in section in Fig. 2 and consists of a metal shell 17 which 'may be open at its under side and provided with a flattened surface 18 to permit its being vided mounted by suitable bolts or screws. At an intermediate point there is mounted inside the handle the springs of a telephone jack indicated at 20, 21, 22 and 23 insulated from each other by the insulating spacers 24 and secured to the handle by screws 25 from which the springs are insulated by the spacers and another insulating piece 26. Sprin 23 contacts with the handle. In the end 0 the handle is. an insulating bushing '30, through which may be-inserted' an ord1- nary telephone plug 31 connected to the two poles of the battery 32 by wires 33 and 34,

one of which 33' leads tothe shaft ofthe P s and the other to the tip thereof.

- -Spr1ngs 22 and 23 of the jack are prowith contacts 35 normally in contact 80, 1925. Serial No. 78,317.

with each other and the handle carries in I indicated in Fig. 2. When the plug is in as shown the circuit will be from one pole of the battery through wire 33 to the plug 'shaft'and to spring 20, then through a coiled 'wire 40 to the end of spring 22 to which is also secured a wire 41 leading to the primary winding of the induction coil, the other end of which winding will be rounded-to the engine. The other pole 0% the battery is connected through Wire 34 to the tip of the plug and thence to spring 23 which is grounded to complete the circuit.

When the plug is withdrawn, the contacts 35 come together and the completed circuit" including the low tension magneto windings is through the latter and then through wire 41 to spring 22, contacts 35, spring 23 to the handle and therefore to ground.

When the motor is operating on themag- I neto circuit, the latter may be broken and the motor stopfped by separating contacts 35 by means 0 button 36. If the battery circuit is bein used, the plug must first be withdrawn, before the circuit can be broken by button 36. v a 1 Coil 40 serves a dual purpose in the installation just described. It serves to connect wire 41 with spring 20 and also as a resistance 'to limit the amount of current which may flow from the battery through I the induction latter.

- Having now described the invention and coil, thereby protecting the the preferred form of embodiment thereof,

the circuit including said magneto and the primarywinding, and an electric battery having its terminals connected to a telephone plug adapted to be inserted in said jack to open said magneto circuit and close a circuit including the battery.

2. An internal combustion engine having magneto ignition, a timer therefor having a handle, a closed circuit telephone jack in c said handle, and a telephone plug connected to the two terminals of a battery, said jack and plug'being constructed and arranged to co-act to insert said battery in the low tension circuit of said magneto.

3. An internal combustion engine having magneto ignition, a timer therefor having a handle, a closed circuit telephone jack in said handle, and a telephone plug connected to the two terminals of a battery, said jack and plug being constructed and arranged to c'o-act to insert said battery in the low tension circuit of said magneto and having a resistance element to limit the current supplied by said battery.

ARTHUR J. CAILLE. 

